The computers price is $1,125, if its marked down 20% how much will i pay ?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Will gve pints stars and brainliest

Combine like terms to make a simpler expression 3z+z